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Old 11-20-2012, 08:25 PM   #33
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Join Date: Apr 2008
Location: Dallas, TX
Posts: 2,217
My Ride: E30-E46-E90-E90M-F30
Originally Posted by TerraPhantm View Post
a) you called the water pump plastic -- it's not. Very early ones may have been, but the majority are composite

b) changing over to the Stewart's pump won't magically make the rest of the cooling system more durable - you'll still have to service it at the same intervals. So you may as well stick with OE water pumps and replace them every 75k(ish) miles along with everything else

c) I never cheap out on my car -- but I also dont throw money away. I'm not going to pay 3x extra for a part that gives me very little benefit over the stock part.

I think the composite wp impellar is made out of nylon/glass reinforced plastic

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